exclude products[ Edited ]
You have more than one ways to achieve this.
1. You can ask you coder to exclude all products under $99 from the feed.
2. You can have a custom label for products under $99 as "Under 99" and then exclude that label from your campaigns.
3. If you have limited number of products and if your prices dont change frequently you can bulk Upload your productIDs to target your campaign.
Hope this helps